DE2359715A1 - Arrgmt for supplying coolant to hand grinder - has pipe provided with a hose connection and outlets at U-shape end - Google Patents

Abstract

A pipe with tap and hose connection is fixed to the protective cap mounted over the grinding wheel of a hand grinding machine. When a slitting wheel is used, the water outlet holes are provided in the sides of a U-shaped pipe end. The legs of the U-shaped pipe are at either side of the wheel so that the water is supplied to the cutting area. When a cup shaped or disc shaped grinding wheel is used, the pipe end is circular so that it completely surrounds the grinding wheel and the cooling water is applied to the circumference of the wheel.

Description

23597T5

OR.-ΙΝβ. 01FU-INe-M ₁ SC. DIPL.-PHYS. DFU OIPL.-PHYS.

HOG ER-.STELLRIGHT- GRiESSBAGH - HAECKER

PATENT LAWYERS IN STUTTGART

A 40 422 m

u ^! - 1 60

20th November 1973

Company Ackermann u.Schmitt KG 7000 Stuttgart 1
Raitelsbergstrasse 49

Device for supplying liquid

The invention relates to a 'device for feeding Liquid, especially water, to the grinding wheel of Hand grinders ο

Hand grinders are used to grind materials / for making separating cuts, for polishing surfaces and the like are used. For many uses it is necessary to wet the grinding wheel with a liquid. So that will cooling of the grinding wheel and / or lubrication. between the grinding wheel and the material to be abraded achieved. The liquid can also be used to wash away the abraded Particles of material serve »as lubricants and coolants preferably water, but also other liquids into consideration. ·

5 09824/0046

A 40 422 m

u - 160

November 20, 1973 - / '-

With grinding wheels working on the face, especially with Cup disks, it is known to pass the liquid through the hollow Feed the drive shaft of the hand grinder in the center of the grinding wheel. This type of feed is complex and prone to failure and presents great difficulties in practical implementation. In this case the liquid has to run out a fixed line through the angular gear of the hand grinder into the rotating drive shaft of the Angle grinder initiated and serious sealing problems arise.

It is the object of the invention to provide a simple device, with which the grinding wheel of a hand grinder is wetted with a rinsing and / or cooling liquid can without this having to be passed through the moving drive shaft of the hand grinder.

This is achieved in that on the machine by means of a carrier a connected to a liquid supply line Spray tube is attached, from which the liquid emerges near the work site or directly onto the grinding wheel.

The following description of preferred embodiments of the invention is used in conjunction with the accompanying drawings for a more detailed explanation. Show it:

Fig. 1 is a plan view of a hand grinder with

a device according to the invention for supplying liquid;

509824/0046

A 40 422 nt ■■ ..- ■ * **. '

u - 160

20th November 1973. - - Jf- _,

FIG. 2 shows a side view along the arrow A in FIG. 1

and - - · ■■ '"■ / - ■ / ■" "- ■■

3 shows a schematic view of a further embodiment of the invention.

In Fig. 1 is the head of a hand-held angle grinder 1 ", on the rotatable shaft 2 of which there is a cup wheel 3, that is to say a grinding wheel working on the end face is consolidated. The working surface of this cup wheel 2 is in the .Drawing marked with the reference number 4. The the Work surface 4 opposite end face of the cup wheel is covered by a protective hood 5, which by means of a Clamp 6 is clamped on the head of the angle grinder 1; (Fig. 1). This protective hood 5 has the upper part of the Cup wheel 2 concentrically at some distance surrounding the edge

According to the invention, a circular shape around this edge 7 bent spray tube 8 is placed, which has a plurality of bores 9 on its underside facing the cup wheel having. The spray tube 8 is with the edge 7 of the protective hood 5, ζ. B-. by soldering, firmly connected. The liquid to be sprayed is fed to the spray tube 8 via a spray media line 11, via a Ventil'12 with a supply of cooling or Lubricant, e.g. the water pipe, is in contact. The holes 9 in the spray tube 8 are arranged so that the through the liquid supplied to the spray media line 1T at the outlet from the spray tube 8 the cup disk 3 in particular in the vicinity their work surface 4 wetted. In this way, the grinding wheel can be cooled when the hand grinder is in operation; through the Movement of the hand grinder on the one to be abraded

50 9 824/0 04 6

A. 40 422 m

u - 160

2o. November 1973

Material can be sprayed onto the side of the grinding wheel Liquid also get directly onto the work surface 4 and thus serve for rinsing and lubrication.

3 shows a hand-held grinding machine 1, known per se, with a grinding wheel 21 operating on the circumference. Such a grinding wheel can, for. B. to separate a metal or stone-like material 20 can be used; one then speaks of cut-off wheels. In Fig. 3 is the Direction of rotation of the grinding wheel by arrow B, the work place the grinding wheel is designated by 23.

According to the invention, a U-shaped spray tube 24 is located in front of the work station 23 and in its vicinity in the direction of rotation arranged, the two legs 25 and 26 of the grinding wheel surrounded on both sides. On the inside of the legs 25 and 26 facing the grinding wheel 21, these are provided with a A plurality of holes 27 are provided. The U-shaped spray tube is connected via a spray media supply line that is firmly connected to the protective hood 22 28 held, which can be connected via a valve 29 to a rinsing or cooling liquid source. At the Operation of the grinding machine, the liquid is passed through the supply line 28 into the .U-shaped spray tube 24 and through the bores 27 are sprayed onto the two end faces of the grinding wheel 21. This is cooled by this, and that of the grinding wheel Any liquid carried along can serve as a rinsing agent for the abraded material if necessary.

It is an advantage of the invention that the liquid on the Grinding wheels can be sprayed without the liquid getting through

- 5 509824/0046

A 40 422 m ·. ',: · ζ \

u - 160.

November 20th 1973 = - JSk-

having to guide moving parts of the grinding machine. Through this is in particular also a retrofitting of a hand grinder possible with a spray device. The fact that the spray device according to the invention over the protective hood or via another carrier fixed to the grinding machine-1 "" is connected, is easy handling of the grinding machine possible without being hindered by the spray device will.

It is also possible to make the holes in the spray tubes like that arrange that the liquid does not hit the grinding wheel directly is sprayed, but in the vicinity of the work site on the material to be abraded. Here, too, contact of the liquid with the grinding wheel can be achieved, so that a Cooling of the grinding wheel and / or rinsing away the abraded material particles is guaranteed.

09824/004

Claims (4)

A 40 422 m u - 160 20th November 1973 Patent claims: (1. Device for supplying liquid, in particular Water, on the grinding wheel of hand grinders, characterized in that on the machine (1) by means of a carrier a with a liquid supply line (11, 28) connected spray tube (8, 24) is attached, from which the liquid in the vicinity of the Work place (4, 23) or directly on the grinding wheel (3, 21) exits. 2. Apparatus according to claim 1, characterized in that in the case of grinding wheels working on the end face, in particular Cup wheels (3), the spray tube (8) is curved in a circle and arranged concentrically to the grinding wheel. ~ 3. Apparatus according to claim 1, characterized in that in the case of grinding wheels working on the circumference, in particular cutting wheels (21), the spray tube (24) is U-shaped and with its legs (2 5, 26) the end faces of the Surrounds the grinding wheel in the vicinity of the work site (23), 4. Device according to one of the preceding claims, characterized in that the spray tube (8, 24) on a protective hood (5, 22) of the grinding wheel is attached. 509824/0046 Lee rs e i t e